Circus Ponies Software, Inc. developed and sold Circus Ponies NoteBook, the electronic notebook that helped you take great notes, manage any project, and stay super organized.

Originally written for the NeXT machine, NoteBook won "App of the Year" from NeXTWORLD magazine in 1991. NoteBook was rewritten to run on OS X, and released in April, 2003. It was ported to the iPad in 2010.

Microsoft cloned NoteBook in the early 2000s to create the craptacular OneNote.